Concentrated bird's nest is just to prepare the bird's nest, refrigerate it, and take out a little water when eating it. There is no stew and no other ingredients are added. You need to stew it again. Stewed bird's nest is the bird's nest that can be eaten directly after being cooked and stewed. If it's no trouble, you can buy dried bird's nest and stew it yourself at home, or you don't want to stew it yourself. You can buy freshly stewed bird's nest and eat it with the lid open, or you can simply heat it yourself to see your personal preferences. I saw a restaurant making fresh stewed bird's nest in Guangzhou, called Yanzhi Fresh Stewed Bird's Nest. You can learn about it.